A large swath of Saharan dust stretches from the Gulf eastward to northern Africa. Rain chances through Thursday will generally be limited to any broken cloud line formation or isolated storms pushing southwestward off the South Florida Mainland. Although a tropical wave will push through the Keys Friday into Saturday, the dry, dusty air may stint what would normally be more widespread storm development for those periods. Dust concentrations may actually increase by late weekend into early next week, with near-nil rain chances possible for several days.